Update readme

Author: newmanw

CHANGELOG.md

@@ -12,6 +12,10 @@ Adheres to [Semantic Versioning](http://semver.org/).
 ## [7.1.4](https://github.com/ngageoint/mage-android/releases/tag/7.1.4)
 
 ##### Features
+* Ensure new observation and attachment sync requests run immediatly by changing the work manager policy to REPLACE.
+  To ensure that work is in fact unique and that no 2 work task are running at the same time a mutex has been placed around
+  the buisness logic for sync.
+* Added a sync now button to the observation view screen to allow users to try and forcefully sync and observation. 
 
 ##### Bug Fixes
 * Fix crash when trying to add an attachment from the gallery if attachment field has no restrictions.